Where do I find a 9" 5.00 or 5.14 Pro Gear with a big pinion

69Cobra · 10-19-2011, 05:17 AM

Quote:

Originally Posted by Run to Rund

I have a good used set of 4.86 pro gears, 35 spline pinion if you want to try that ratio. I don't know of any big pinion gears higher numerically than 4.86. Stockers have to run 28 spline pinions.

Thanks for the offer but that's what we are running now and I'm wanting to try a 5.00 or 5.13 in the future but I really didn't want to go back to a 28 spline to do it. So everybody that is running anything deeper than a 4.86 is running a 28 spline pinion????

buzzinhalfdozen · 10-19-2011, 09:05 AM

Kris, that would seem to be the case, I've done quite a few 28 spline gears for S/S cars from my 6 cyl. up to a few B/ Modifieds. Never had an issue with the smaller pinion diameter. Not sure of your application but unless you're trying to rotate the earth with it you'll be fine with the 28 spline. Joe I may have a used 5.13 you could try if you're interested let me know

69Cobra · 10-19-2011, 11:00 AM

Thanks for the replies guys. The problem is, is that we've broke a lot of gears in the past as well as breaking the pinion in two. BUT I just realized these were all street gears. So maybe the 28 spline pro gear will hold up. Thanks for the offer on the gears but I'm at least a year from needing them. I'm just trying to think ahead. Joe, the application is a 3800# stocker that my dad used to race back in the 70's and 80's and I've been bracket racing it for the past 16-17 years. Its a 69 Fairlane Cobra 428CJ 4 speed car. I'm going to be putting it back as a stocker and I know that I'm going to be needing the 5.00 or 5.13 gear to make it go.

Jamie Greening · 10-19-2011, 12:43 PM

The only thing out there with a big pinion in that ratio is a ten inch gear Tom's gears makes. All the 1/8 mile promods run them. They come in 5.00 and 5.14 require a big bearing case and a spacer under the pinion support. Also mark williams makes a 32 spline gear alot of the pro stock guy run but requires more special parts to make work. Good luck. Forgot Tom's 10 inch gear is $1200.00 a set.

69Cobra · 10-20-2011, 05:01 AM

Thanks guys. I guess that pretty much answers my question. I guess a 28 spline pro gear will be it.

10-19-2011, 09:05 AM	#2
buzzinhalfdozen Senior Member Join Date: Sep 2006 Location: Bellevue Ohio Posts: 984 Likes: 0 Liked 11 Times in 8 Posts	Re: Where do I find a 9" 5.00 or 5.14 Pro Gear with a big pi Kris, that would seem to be the case, I've done quite a few 28 spline gears for S/S cars from my 6 cyl. up to a few B/ Modifieds. Never had an issue with the smaller pinion diameter. Not sure of your application but unless you're trying to rotate the earth with it you'll be fine with the 28 spline. Joe I may have a used 5.13 you could try if you're interested let me know __________________ Joe Buchanan SS/BX 3117

10-19-2011, 11:00 AM	#3
69Cobra Senior Member Join Date: Aug 2007 Location: California, Ky Posts: 669 Likes: 61 Liked 2 Times in 2 Posts	Re: Where do I find a 9" 5.00 or 5.14 Pro Gear with a big pi Thanks for the replies guys. The problem is, is that we've broke a lot of gears in the past as well as breaking the pinion in two. BUT I just realized these were all street gears. So maybe the 28 spline pro gear will hold up. Thanks for the offer on the gears but I'm at least a year from needing them. I'm just trying to think ahead. Joe, the application is a 3800# stocker that my dad used to race back in the 70's and 80's and I've been bracket racing it for the past 16-17 years. Its a 69 Fairlane Cobra 428CJ 4 speed car. I'm going to be putting it back as a stocker and I know that I'm going to be needing the 5.00 or 5.13 gear to make it go. __________________ Kris Rachford 69 Cobra 428CJ 4 Speed C/S 3032

10-19-2011, 12:43 PM	#4
Jamie Greening Junior Member Join Date: Jun 2007 Posts: 45 Likes: 0 Liked 0 Times in 0 Posts	Re: Where do I find a 9" 5.00 or 5.14 Pro Gear with a big pi The only thing out there with a big pinion in that ratio is a ten inch gear Tom's gears makes. All the 1/8 mile promods run them. They come in 5.00 and 5.14 require a big bearing case and a spacer under the pinion support. Also mark williams makes a 32 spline gear alot of the pro stock guy run but requires more special parts to make work. Good luck. Forgot Tom's 10 inch gear is $1200.00 a set. Last edited by Jamie Greening; 10-19-2011 at 12:45 PM.

10-20-2011, 05:01 AM	#5
69Cobra Senior Member Join Date: Aug 2007 Location: California, Ky Posts: 669 Likes: 61 Liked 2 Times in 2 Posts	Re: Where do I find a 9" 5.00 or 5.14 Pro Gear with a big pi Thanks guys. I guess that pretty much answers my question. I guess a 28 spline pro gear will be it. __________________ Kris Rachford 69 Cobra 428CJ 4 Speed C/S 3032

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